Here is ARK bubble for Vita firmware 3.60.
From the readme.
[spoiler]Copy PBOOT.PBP to base PSP game folder in ms0:/PSP/GAME/GAMEID/
Transfer PSP save to the Vita.
Backup and restore base PSP game with CMA/QCMA.
You should now have ARK on the Live Area where the original base game should be.
Now you can run PSP homebrew and games.
Enjoy ARK on 3.60.

To exit games and homebrew to the ARK menu, hold L + R + Down + Start.

this kexploit involves AES decryption/encryption
(using sceChnnlsv buffer in kernel RAM for fake thread UID)
for it to work with the threadman UID exploit. [/spoiler]
Download:https://www.datafilehost.com/d/56e953ac